"Guilty Except for Insanity" will screen April 11 in a special benefit show.

The documentary, by Portland State University professor Jan Haaken, follows individuals who were sent to the Oregon State Hospital with a "guilty except for insanity" plea.

The documentary is told from the perspective of those inside the institution, both patients and staff.

It shows at 1 and 7 p.m. April 11 at the Grand Theater, 191 High St. Tickets are available at Travel Salem, 181 High St, NE, or through www.absolutelytix.com. Proceeds benefit the documentary itself, which will be submitted to festivals.